文献类型：期刊文献

英文题名：Two-scale damage failure analysis of 3D braided composites considering pore defects

作者：Ge, Lei Li, Huimin Zheng, Huayong Zhang, Chun Fang, Daining

第一作者：Ge, Lei

通信作者：Li, HM[1]

机构：[1]Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;[2]Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian, Peoples R China;[3]Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 10081, Peoples R China;[4]Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China;[5]Aerosp Syst Engn Shanghai, Yuanjiang Rd 3888, Shanghai 201109, Peoples R China;[6]Shanghai Key Lab Spacecraft Mech, Jindou Rd 3805, Shanghai 201108, Peoples R China;[7]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China

第一机构：Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

通信机构：corresponding author), Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China.

年份：2021

卷号：260

外文期刊名：COMPOSITE STRUCTURES

收录：;EI(收录号：20210309804725);Scopus(收录号：2-s2.0-85099467494);WOS:【SCI-EXPANDED(收录号:WOS:000618745800006)】；

基金：This work was financially supported by the National Natural Science Foundation of China (11602020, 518630003), National defense Basic research program of China (JCKY2019602D024), China Postdoctoral Science Foundation (2016M591084), Laboratory research project of Beijing Institute of Technology (2019BITSYA33), Frontier and interdisciplinary innovation projects of Beijing Institute of Technology (2018CX11001), Fund of State Key Laboratory for Strength and Vibration of Mechanical Structures (SV2018-KF-15).

语种：英文

外文关键词：3D braided composites; Two-scale analysis; Pore defects; Damage failure; Strength

摘要：Pore defects tend to form in the manufacturing process, and significantly influence the mechanical properties of 3D braided composites. To predict the failure modes and strength properties considering pore defects, a two scale progressive damage method coupled with representative volume cell (RVC) has been developed due to the periodic feature across different scales of 3D braided composites. Different void generating methods across two scales are established, including the element-model by elements chosen and the void-model by voids explicitly constructed. The user-defined material subroutine (UMAT) is coupled in the nonlinear finite element analysis software ABAQUS to implement the damage model for micro and meso numerical models. Also, the Chamis model considering pore defects are employed and verified. It shows that results by void-model agree well with the Chamis model and the experimental data. And, the void-model is superior to the element-model when predicting the mechanical properties of braided composites. The pore defects weaken the matrix properties, and therefore largely determine the strength and damage mechanism of 3D braided composites with large braiding angle. This two-scale damage failure analysis method by void-model is effective to predict strength and damage failure mechanism of 3D braided composites considering pore defects.